Milwaukee County Sheriff David Clarke said a call came in at 11:59 a.m. of a shooting on the seventh floor of the hospital, which houses the neonatal unit.

Milwaukee Police Department Chief Ed Flynn said two police officers were in the building because a call indicating there was an armed man in the hospital.

The man was 22-year-old Ashanti Hendricks, who was wanted on a warrant. WISN 12 News learned the warrant was for failure to appear in court. Hendricks had pleaded guilty to felon in possession of a firearm.

Clarke said officers located Hendricks in the Neonatal Progressive Care Unit on the seventh floor and was holding an infant. Clarke said police officers informed the Hendricks he was under arrest. Clarke said he then put down the infant and initially went with them.

Then, Hendricks started to struggle with the officers, Flynn said. That is when the officers saw he had a semiautomatic pistol. He escaped from the officers' grasp and ran down a hallway. When Hendricks turned on the officers with the gun, one of the officers shot him twice in the arm, forcing him to drop the pistol, Flynn said. The man continued to run, but after a struggle on the ground, he was taken into custody.

The Milwaukee Police Department, Milwaukee County Sheriff's Office and Wauwatosa Police are investigating the incident. The Milwaukee County District Attorney's office is also on scene as a matter of protocol for officer-involved shootings.

Law enforcement gave an all-clear for the Children's Hospital buildings at about 2:05 p.m.

Children's Hospital prepares its employees to know what to do in the case of an active shooter.

One worker showed WISN 12 News the card they wear with the protocol on it, reminding them to lockdown the area where they are.

"It's our Children's protocol, so for an active shooter it's first get out is our first protocol, which is what I did with some patients, so you just need to get out, get taken care of That's what we did, and the people that are left inside need to hide. I know a lot of them are hiding right now," clinical assistant Ashley Paczocha said.

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